// https://github.com/omichelsen/compare-versions tag v3.6.0
const semver = /^v?(?:\d+)(\.(?:[x*]|\d+)(\.(?:[x*]|\d+)(\.(?:[x*]|\d+))?(?:-[\da-z\-]+(?:\.[\da-z\-]+)*)?(?:\+[\da-z\-]+(?:\.[\da-z\-]+)*)?)?)?$/i;

function indexOrEnd(str, q) {
    return str.indexOf(q) === -1 ? str.length : str.indexOf(q);
}

function split(v) {
    var c = v.replace(/^v/, '').replace(/\+.*$/, '');
    var patchIndex = indexOrEnd(c, '-');
    var arr = c.substring(0, patchIndex).split('.');
    arr.push(c.substring(patchIndex + 1));
    return arr;
}

function tryParse(v) {
    return isNaN(Number(v)) ? v : Number(v);
}

function validate(version) {
    if (typeof version !== 'string') {
        throw new TypeError('Invalid argument expected string');
    }
    if (!semver.test(version)) {
        throw new Error('Invalid argument not valid semver (\'' + version + '\' received)');
    }
}

function Semver() {
}

Semver.compareVersion = function(v1, v2) {
    [v1, v2].forEach(validate);

    var s1 = split(v1);
    var s2 = split(v2);

    for (var i = 0; i < Math.max(s1.length - 1, s2.length - 1); i++) {
        var n1 = parseInt(s1[i] || 0, 10);
        var n2 = parseInt(s2[i] || 0, 10);

        if (n1 > n2) return 1;
        if (n2 > n1) return -1;
    }

    var sp1 = s1[s1.length - 1];
    var sp2 = s2[s2.length - 1];

    if (sp1 && sp2) {
        var p1 = sp1.split('.').map(tryParse);
        var p2 = sp2.split('.').map(tryParse);

        for (i = 0; i < Math.max(p1.length, p2.length); i++) {
            if (p1[i] === undefined || typeof p2[i] === 'string' && typeof p1[i] === 'number') return -1;
            if (p2[i] === undefined || typeof p1[i] === 'string' && typeof p2[i] === 'number') return 1;

            if (p1[i] > p2[i]) return 1;
            if (p2[i] > p1[i]) return -1;
        }
    } else if (sp1 || sp2) {
        return sp1 ? -1 : 1;
    }

    return 0;
};


Semver.validate = function(version) {
    return typeof version === 'string' && semver.test(version);
};
